go_home_countdown.sh

#!/bin/bash

# Run with a single argument - number of minutes remaining.
# For example for 1 min countdown use:
# ./go_home_countdown.sh 1

set -e

remaining=$(( $1 * 60 ))

while [ "$remaining" -ge 0 ]
do
  clear
  banner "$remaining sec"
  sleep 1
  remaining=$(( $remaining - 1 ))
done

clear
banner "Hooray!"
banner "Let's"
banner "go..."
banner "HOME!!!"